FEMTOSECOND TUNABLE WAVELENGTH LASER SYSTEM FemtoTune femtosecond optical parametric amplifier is designed to meet the demanding specifications of modern ultrafast science, while introducing valuable features that enhance measurement efficiency, convenience, flexibility, and reliability. FemtoTune is based on Ekspla's extensive experience in developing picosecond and nanosecond tunable systems, as well as optical parametric chirped pulse amplifiers (OPCPAs) with pulse energies up to 1 joule and durations as short as 10 fs. FemtoTune delivers a compact, high-repetition-rate (up to 100 kHz) solution with sub-50 fs pulse duration across the broad wavelength tuning range, tailored for modern ultrafast spectroscopy and imaging. The time-synchronised motor positioning enables fast and smooth wavelength tuning, allowing users to scan the full range in just a few seconds or access specific wavelengths within several tenths of a second. Continuous, gapless tuning in the mid-IR (2.5-10 pm) with a single polarisation eliminates the need to switch between signal and idler waves. This results in faster, more stable measurements ensuring excellent beam pointing stability. For applications requiring narrow spectral bandwidths, such as SFG or CARS, FemtoTune offers an additional narrowband channel at 1030 nm or 515 nm, providing <8 cm-1 bandwidth without the need for complex spectral narrowing techniques. Optical synchronisation with most of our picosecond lasers and wavelength tunable systems allows achieving even narrower bandwidth (<3 cm"i) enabling simultaneous high temporal and spectral resolution measurements. Pumped by robust award-winning industrial-grade FemtoLux series laser, FemtoTune offers long-term stability, hands-free operation, and minimal maintenance. FemtoTune delivers ultrashort pulses at high repetition rate, enhanced by advanced functionality, all in a compact system. Tunable Femtosecond System for Ultrafast Applications tuning range ► <50 fs pulse duration featuring integrated dispersion compensation ► Single shot -100 kHz repetition rate ► Scan of full wavelength range in a few seconds and fast wavelength sweep ► Pumped by reliable Femtolux series lasers featuring dry or water cooling ► Additional narrow spectral bandwidth optically synchronised output at 1030 or at 515 nm less than 8 cm-1 ► Optical synchronisation with picosecond Ekspla laser sources: e.g. PL2231, PT501 (bandwidth below3 cm~i) ► Ultrafast non-linear spectroscopy: REV. 250619 SAVANORIU AV. 237, LT-02300 VILNIUS, LITHUANIA PH +370 5 2649629 E-MAIL [email protected] WWW.EKSPLA.COM &EKSPLA

FemtoTune series FEMTOSECOND TUNABLE WAVELENGTH LASER SYSTEM &EKSPLA SAVANORIU AV. 237, LT-02300 VILNIUS, LITHUANIA PH +370 5 2649629 E-MAIL [email protected] WWW.EKSPLA.COM REV. 250619

FemtoTune series Signal NIR Signal SWIR Mid-IR Signal NIR Signal SWIR NIR-SH SWIR-SH Mid-IR Pump laser FemtoLux series: 1 mJ @ 1030 nm, 10 kHz 300 Fig 1. Spectral range and pulse energy with extensions Fig 2. Pulse bandwidth in NIR, SWIR and Mid-IR wavelength ranges Beam direction, µrad Fig 3. Pulse energy stability Fig 4. Beam pointing stability SAVANORIU AV. 237, LT-02300 VILNIUS, LITHUANIA PH +370 5 2649629 E-MAIL SALES@EKSPL A.COM WWW.EKSPL A.COM

FemtoTune series Fig 5. External dimensions of FemtoTune femtosecond tunable wavelength laser system Pump Laser FemtoLux series femtosecod laser SAVANORIU AV. 237, LT-02300 VILNIUS, LITHUANIA PH +370 5 2649629 E-MAIL SALES@EKSPL A.COM WWW.EKSPL A.COM   REV. 250